scala IntelliJ IDEA 13 CE 消耗大量 CPU
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IntelliJ IDEA 13 CE consuming lots of CPU
提问by K P
I upgraded from IntelliJ IDEA from 12 CE to 13 CE few days ago and it has been hogging up CPU. Every few minutes it'll peak to 450-500% and then come down to 100-200%. Also, I've upgraded my Scala plugin to 0.30.380. Not sure what's causing the issue!?
几天前我从 IntelliJ IDEA 从 12 CE 升级到 13 CE，它一直在占用 CPU。每隔几分钟它就会达到 450-500% 的峰值，然后下降到 100-200%。此外，我已将我的 Scala 插件升级到 0.30.380。不知道是什么导致了这个问题！？
回答by ziggystar
I'm posting this comment by K P as an answer, because K P does not have enough reputation.
我通过 KP 发布此评论作为答案，因为 KP 没有足够的声誉。
It just needed some more memory to prevent repeated garbage collection. I found the file idea.vmoptions [aka idea64.exe.vmoptions] and increased the memory for InteiiJ to run (Xms = 512m and Xmx = 2048). The CPU usage has come down to 0.2 - 10% when nothing is being done on it.
它只需要更多的内存来防止重复的垃圾收集。我找到了idea.vmoptions [又名idea64.exe.vmoptions] 文件并增加了InteiiJ 运行的内存（Xms = 512m 和Xmx = 2048）。当什么都不做时，CPU 使用率已降至 0.2 - 10%。
回答by user2982704
Go to your home folder, then navigate to .IntelliJIdea13\config\options
转到您的主文件夹，然后导航到 .IntelliJIdea13\config\options
Edit the file project.default.xmlby changing the VM_PARAMETERSXmxand Xmsas follows:
project.default.xml通过更改VM_PARAMETERSXmx和Xms来编辑文件，如下所示：
<option name="VM_PARAMETERS" value="-Xmx2048m -Xms512m -XX:MaxPermSize=250m -ea" />
<option name="VM_PARAMETERS" value="-Xmx2048m -Xms512m -XX:MaxPermSize=250m -ea" />
It decreased the CPU usage to 50%.
它将 CPU 使用率降低到 50%。
回答by demian
Try clean up cache and restart. In Intellij 14 go to menu File -> Invalidate Caches / Restart...
尝试清理缓存并重新启动。在 Intellij 14 中，转到菜单 File -> Invalidate Caches / Restart...
回答by xlaoyu.Lee
As other said,increasing memory heap of IDEA is work, my IDEA version is 2016.3.4, following is setting way
正如其他人所说，增加IDEA的内存堆是可行的，我的IDEA版本是2016.3.4，以下是设置方式
- Do one of the following:
- Use the main menu command Help | Edit Custom VM Options to create a copy of the idea.vmoptions file in the user home. Refer to Edit Custom VM Options for details.
- Copy the existing file from the IntelliJ IDEA installation folder somewhere and save the path to this location in the environment variable IDEA_VM_OPTIONS.
- Copy the existing file /bin/idea.exe.vmoptions or /bin/idea64.exe.vmoptions from the IntelliJ IDEA installation folder into the location under your user home.
- 执行以下操作之一：
- 使用主菜单命令帮助 | 编辑自定义 VM 选项以在用户主目录中创建 idea.vmoptions 文件的副本。有关详细信息，请参阅编辑自定义 VM 选项。
- 从某个地方的 IntelliJ IDEA 安装文件夹复制现有文件，并将路径保存在环境变量 IDEA_VM_OPTIONS 中。
- 将现有文件 /bin/idea.exe.vmoptions 或 /bin/idea64.exe.vmoptions 从 IntelliJ IDEA 安装文件夹复制到用户主目录下的位置。
回答by pd12
If anyone's wondering the "right" way to edit the idea.vmoptions or idea64.vmoptions file, here it is: https://www.jetbrains.com/idea/help/tuning-intellij-idea.html
如果有人想知道编辑idea.vmoptions 或idea64.vmoptions 文件的“正确”方式，请访问：https://www.jetbrains.com/idea/help/tuning-intellij-idea.html
On *NIX, you want to copy
在 *NIX 上，您要复制
<IntelliJ IDEA installation folder>/bin/idea64.vmoptions
to:
到：
$HOME/.IntelliJIdeaXX/idea64.vmoptions
and edit that file to increase the heap memory for IntelliJ IDEA
并编辑该文件以增加 IntelliJ IDEA 的堆内存
(OP's example settings: Xms = 512m and Xmx = 2048)
（OP 的示例设置：Xms = 512m 和 Xmx = 2048）
